2020
DOI: 10.3897/zookeys.928.47517
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Abstract: The geological and paleoenvironmental setting and the vertebrate taxonomy of the fossiliferous, Cenomanian-age deltaic sediments in eastern Morocco, generally referred to as the “Kem Kem beds”, are reviewed. These strata are recognized here as the Kem Kem Group, which is composed of the lower Gara Sbaa and upper Douira formations. Both formations have yielded a similar fossil vertebrate assemblage of predominantly isolated elements pertaining to cartilaginous and bony fishes, turtles, crocodyliforms, pterosaur… Show more

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Cited by 57 publications
(113 citation statements)
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References 232 publications
(605 reference statements)
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“…Geological setting-In North Africa, the 'Continental Intercalaire' comprises an extensive non-marine succession of fluvial and fluvial-deltaic facies of Late Jurassic to 'middle' Cretaceous age (Kilian, 1931;De Lapparent, 1960;Cavin et al, 2010;Ibrahim et al, 2020). In Morocco, the 'Continental Intercalaire' is informally known as the "Kem Kem Beds" (Sereno et al, 1996); this term subsequently was later restricted to deposits of mid-Cretaceous age Albian and/or Cenomanian age (Cavin et al, 2010).…”
Section: Study Area and Taphonomymentioning
confidence: 99%
“…Previously, the most ancient record of Notopteroidei was Palaeonotopterus from the? Albian-Cenomanian Kem Kem Group of Morocco [ 45 , 55 , 56 ], providing a minimum age of ~94 Mya for the oldest presence of Notopteroidei in Africa. Using this fossil to calibrate the minimum age of Notopteroidei in a molecule-based study, Lavoué [ 57 ] estimated the mean age of the crown group Notopteroidei to 110 million years (95% credibility interval: 130–95 million years).…”
Section: Discussionmentioning
confidence: 99%
“…At Asfla the formation comprises a sequence of alternating facies succession of fossiliferous packstones, chalk dominated marls, cherts and a vertebrate-yielding, Konservat-Lagerstätten nodular horizons (Asfla Member), the latter of which is mined commercially for its beautiful fossils. The Akrabou Formation stratigraphically succeeds non-sequentially the ?Albian–Cenomanian Ifezouane and Aoufous formations of the fluvial, and fluvio lagoonal Kem Kem Group (see Ibrahim et al., 2020 ).…”
Section: Geological Contextmentioning
confidence: 99%
“…1B), Absence of marine organisms and the presence of mudcracks, unionids and larvae of insects restricted to freshwater environments, strongly suggest a low-energy seasonally dried freshwater deposition environment (Dutheil, 1999;Garassino et al, 2006). A paleoenvironmental model of the whole Kem Kem area is available in Ibrahim et al (2020).…”
Section: Geological and Paleoenvironmental Contextmentioning
confidence: 99%
“…The wide range of morphological variations in frontal bone is observable in many theropod species (e. g., Currie, 1987;Barsbold and Osmólska, 1999) and due to this, many authors have expressed great cautions about using such features when diagnosing a theropod taxon (Ibrahim et al, 2020;Smyth et al, 2020). Additionally, Carpenter (2010) suggested that autapomorphies based around minor variation of highly variable regions should be rejected.…”
Section: A B Cmentioning
confidence: 99%